Refrigeration Technician

Founded in 1985, ATS is a company with a presence in the United States, Mexico and the United Kingdom. We are professionals in Industrial Maintenance and we make factories run better. Fundada en 1985, ATS es una empresa con presencia en los Estados Unidos, México y el Reino Unido. Somos profesionales en mantenimiento industrial y hacemos que las fábricas funcionen mejor.

Maintenance & Repair

• Performs expert-level preventive maintenance (PM) and break-fix repairs on high-capacity industrial refrigeration systems, including:
• Parallel compressor rack systems and associated suction/discharge headers
• Evaporative cooling towers (counter flow and crossflow), closed-circuit fluid coolers, and condenser water systems
• Process chillers (air-cooled and water-cooled), evaporators, and heat exchangers
• Commercial and industrial walk-in coolers, freezers, and refrigerated process equipment
• Refrigerant metering devices including TXVs, EEVs, and fixed-orifice systems
• Identifies and resolves root causes of equipment failures through systematic diagnosis — including refrigerant pressure/temperature analysis, superheat/subcooling measurements, oil analysis, and electrical load testing
• Performs refrigerant handling, recovery, reclaim, and recharge operations in strict compliance with EPA Section 608 regulations; maintains accurate refrigerant usage and leak rate records
• Executes leak detection and repair on high-charge systems using electronic detectors, UV dye, and nitrogen pressure testing protocols
• Inspects, cleans, and restores cooling tower components including fill media, drift eliminators, water distribution systems, float valves, basin structures, and drive systems
• Replaces and repairs system components including compressors, condensers, evaporator coils, expansion valves, solenoid valves, pressure controls, hot gas bypass assemblies, and defrost systems
• Performs brazing, soldering, and refrigerant piping work following nitrogen purge best practices to prevent internal oxidation

• Troubleshoots and repairs complex refrigeration control systems including rack controllers, electronic expansion valve drivers, defrost controllers, and building automation system (BAS) integration points
• Diagnoses and resolves electrical faults in 3-phase motor circuits, compressor contractors, variable frequency drives (VFDs), control transformers, and low-voltage control wiring
• Interprets wiring schematics, ladder diagrams, P&IDs, and control panel layouts
• Interfaces with PLC-based and proprietary rack controllers (e.g., Copeland Core Sense, Hussmann HMC, Danfoss AK-CC) for setpoint adjustment, alarm diagnostics, and data trending
• Works with site engineering or controls teams to resolve communication and integration issues between refrigeration equipment and local control networks or SCADA systems

• Monitors and maintains cooling tower water chemistry including pH, conductivity, cycles of concentration, biocide levels, and corrosion inhibitor dosing in coordination with the water treatment program
• Executes blowdown procedures and evaluates makeup water consumption to maintain system efficiency and prevent scale, corrosion, and Legionella risk
• Complies with site Legionella Water Management Plan (WMP) requirements and documents all water system inspections and treatments

• Utilizes predictive maintenance tools including vibration analysis, ultrasonic leak detection, infrared thermography, and oil sample submission to identify developing failures before breakdown
• Monitors refrigeration system trends (compressor amp draw, superheat/subcooling, pressure differentials, oil levels, condenser approach temperatures) and makes proactive maintenance recommendations
• Maintains accurate work records in the Computerized Maintenance Management System (CMMS); reviews equipment history to identify repeat failure patterns and drive reliability improvements

• Collaborates with the Planner/Scheduler to develop, refine, and optimize PM procedures, frequency, and scope for refrigeration assets
• Identifies and sources replacement parts, refrigerants, lubricants, and consumables; evaluates alternative components for improved cost or reliability
• Mentors and provides on-the-job technical training to junior and mid-level technicians; documents technical procedures for knowledge transfer
• Leads and participates in continuous improvement (CI) activities targeting energy…